Use noexcept where reasonable.

14 files changed, 115 insertions, 115 deletions

diff --git a/qt/ScintillaEdit/ScintillaDocument.cpp b/qt/ScintillaEdit/ScintillaDocument.cpp
index a260768d8..b21207a5c 100644
--- a/qt/ScintillaEdit/ScintillaDocument.cpp
+++ b/qt/ScintillaEdit/ScintillaDocument.cpp
@@ -44,7 +44,7 @@ public:
     void NotifyModifyAttempt(Document *doc, void *userData) override;
     void NotifySavePoint(Document *doc, void *userData, bool atSavePoint) override;
     void NotifyModified(Document *doc, DocModification mh, void *userData) override;
-    void NotifyDeleted(Document *doc, void *userData) override;
+    void NotifyDeleted(Document *doc, void *userData) noexcept override;
     void NotifyStyleNeeded(Document *doc, void *userData, Sci::Position endPos);
     void NotifyLexerChanged(Document *doc, void *userData) override;
     void NotifyErrorOccurred(Document *doc, void *userData, int status) override;
@@ -73,7 +73,7 @@ void WatcherHelper::NotifyModified(Document *, DocModification mh, void *) {
                          mh.linesAdded, mh.line, mh.foldLevelNow, mh.foldLevelPrev);
 }
 
-void WatcherHelper::NotifyDeleted(Document *, void *) {
+void WatcherHelper::NotifyDeleted(Document *, void *) noexcept {
 }
 
 void WatcherHelper::NotifyStyleNeeded(Document *, void *, Sci::Position endPos) {
diff --git a/src/CaseFolder.cxx b/src/CaseFolder.cxx
index 0fd29c7bb..7db4bb679 100644
--- a/src/CaseFolder.cxx
+++ b/src/CaseFolder.cxx
@@ -41,7 +41,7 @@ void CaseFolderTable::SetTranslation(char ch, char chTranslation) {
 	mapping[static_cast<unsigned char>(ch)] = chTranslation;
 }
 
-void CaseFolderTable::StandardASCII() {
+void CaseFolderTable::StandardASCII() noexcept {
 	for (size_t iChar=0; iChar<sizeof(mapping); iChar++) {
 		if (iChar >= 'A' && iChar <= 'Z') {
 			mapping[iChar] = static_cast<char>(iChar - 'A' + 'a');
diff --git a/src/CaseFolder.h b/src/CaseFolder.h
index 5fa65870e..eb852a491 100644
--- a/src/CaseFolder.h
+++ b/src/CaseFolder.h
@@ -24,7 +24,7 @@ public:
 	~CaseFolderTable() override;
 	size_t Fold(char *folded, size_t sizeFolded, const char *mixed, size_t lenMixed) override;
 	void SetTranslation(char ch, char chTranslation);
-	void StandardASCII();
+	void StandardASCII() noexcept;
 };
 
 class ICaseConverter;
diff --git a/src/Document.cxx b/src/Document.cxx
index 711f314e4..0f71ba843 100644
--- a/src/Document.cxx
+++ b/src/Document.cxx
@@ -473,7 +473,7 @@ void Document::ClearLevels() {
 	Levels()->ClearLevels();
 }
 
-static bool IsSubordinate(int levelStart, int levelTry) {
+static bool IsSubordinate(int levelStart, int levelTry) noexcept {
 	if (levelTry & SC_FOLDLEVELWHITEFLAG)
 		return true;
 	else
diff --git a/src/Document.h b/src/Document.h
index d2671d182..3eeeef029 100644
--- a/src/Document.h
+++ b/src/Document.h
@@ -126,11 +126,11 @@ struct StyledText {
 
 class HighlightDelimiter {
 public:
-	HighlightDelimiter() : isEnabled(false) {
+	HighlightDelimiter() noexcept : isEnabled(false) {
 		Clear();
 	}
 
-	void Clear() {
+	void Clear() noexcept {
 		beginFoldBlock = -1;
 		endFoldBlock = -1;
 		firstChangeableLineBefore = -1;
@@ -174,13 +174,13 @@ protected:
 	ILexer4 *instance;
 	bool performingStyle;	///< Prevent reentrance
 public:
-	explicit LexInterface(Document *pdoc_) : pdoc(pdoc_), instance(nullptr), performingStyle(false) {
+	explicit LexInterface(Document *pdoc_) noexcept : pdoc(pdoc_), instance(nullptr), performingStyle(false) {
 	}
 	virtual ~LexInterface() {
 	}
 	void Colourise(Sci::Position start, Sci::Position end);
 	virtual int LineEndTypesSupported();
-	bool UseContainerLexing() const {
+	bool UseContainerLexing() const noexcept {
 		return instance == nullptr;
 	}
 };
@@ -578,7 +578,7 @@ public:
 	virtual void NotifyModifyAttempt(Document *doc, void *userData) = 0;
 	virtual void NotifySavePoint(Document *doc, void *userData, bool atSavePoint) = 0;
 	virtual void NotifyModified(Document *doc, DocModification mh, void *userData) = 0;
-	virtual void NotifyDeleted(Document *doc, void *userData) = 0;
+	virtual void NotifyDeleted(Document *doc, void *userData) noexcept = 0;
 	virtual void NotifyStyleNeeded(Document *doc, void *userData, Sci::Position endPos) = 0;
 	virtual void NotifyLexerChanged(Document *doc, void *userData) = 0;
 	virtual void NotifyErrorOccurred(Document *doc, void *userData, int status) = 0;
diff --git a/src/EditModel.h b/src/EditModel.h
index 3da6afb58..5fb6a0f02 100644
--- a/src/EditModel.h
+++ b/src/EditModel.h
@@ -62,7 +62,7 @@ public:
 	virtual Sci::Line TopLineOfMain() const = 0;
 	virtual Point GetVisibleOriginInMain() const = 0;
 	virtual Sci::Line LinesOnScreen() const = 0;
-	virtual Range GetHotSpotRange() const = 0;
+	virtual Range GetHotSpotRange() const noexcept = 0;
 	bool BidirectionalEnabled() const;
 	bool BidirectionalR2L() const;
 };
diff --git a/src/EditView.cxx b/src/EditView.cxx
index 4417525b8..a29df0f2f 100644
--- a/src/EditView.cxx
+++ b/src/EditView.cxx
@@ -63,7 +63,7 @@ static constexpr bool IsControlCharacter(int ch) noexcept {
 	return ch >= 0 && ch < ' ';
 }
 
-PrintParameters::PrintParameters() {
+PrintParameters::PrintParameters() noexcept {
 	magnification = 0;
 	colourMode = SC_PRINT_NORMAL;
 	wrapState = eWrapWord;
@@ -192,25 +192,25 @@ EditView::EditView() {
 EditView::~EditView() {
 }
 
-bool EditView::SetTwoPhaseDraw(bool twoPhaseDraw) {
+bool EditView::SetTwoPhaseDraw(bool twoPhaseDraw) noexcept {
 	const PhasesDraw phasesDrawNew = twoPhaseDraw ? phasesTwo : phasesOne;
 	const bool redraw = phasesDraw != phasesDrawNew;
 	phasesDraw = phasesDrawNew;
 	return redraw;
 }
 
-bool EditView::SetPhasesDraw(int phases) {
+bool EditView::SetPhasesDraw(int phases) noexcept {
 	const PhasesDraw phasesDrawNew = static_cast<PhasesDraw>(phases);
 	const bool redraw = phasesDraw != phasesDrawNew;
 	phasesDraw = phasesDrawNew;
 	return redraw;
 }
 
-bool EditView::LinesOverlap() const {
+bool EditView::LinesOverlap() const noexcept {
 	return phasesDraw == phasesMultiple;
 }
 
-void EditView::ClearAllTabstops() {
+void EditView::ClearAllTabstops() noexcept {
 	ldTabstops.reset();
 }
 
@@ -278,7 +278,7 @@ void EditView::AllocateGraphics(const ViewStyle &vsDraw) {
 		pixmapIndentGuideHighlight.reset(Surface::Allocate(vsDraw.technology));
 }
 
-static const char *ControlCharacterString(unsigned char ch) {
+static const char *ControlCharacterString(unsigned char ch) noexcept {
 	const char * const reps[] = {
 		"NUL", "SOH", "STX", "ETX", "EOT", "ENQ", "ACK", "BEL",
 		"BS", "HT", "LF", "VT", "FF", "CR", "SO", "SI",
@@ -825,7 +825,7 @@ Sci::Position EditView::StartEndDisplayLine(Surface *surface, const EditModel &m
 	return posRet;
 }
 
-static ColourDesired SelectionBackground(const ViewStyle &vsDraw, bool main, bool primarySelection) {
+static ColourDesired SelectionBackground(const ViewStyle &vsDraw, bool main, bool primarySelection) noexcept {
 	return main ?
 		(primarySelection ? vsDraw.selColours.back : vsDraw.selBackground2) :
 		vsDraw.selAdditionalBackground;
@@ -2335,7 +2335,7 @@ void EditView::FillLineRemainder(Surface *surface, const EditModel &model, const
 // Space (3 space characters) between line numbers and text when printing.
 #define lineNumberPrintSpace "   "
 
-static ColourDesired InvertedLight(ColourDesired orig) {
+static ColourDesired InvertedLight(ColourDesired orig) noexcept {
 	unsigned int r = orig.GetRed();
 	unsigned int g = orig.GetGreen();
 	unsigned int b = orig.GetBlue();
diff --git a/src/EditView.h b/src/EditView.h
index f81634cac..90771c2ba 100644
--- a/src/EditView.h
+++ b/src/EditView.h
@@ -14,7 +14,7 @@ struct PrintParameters {
 	int magnification;
 	int colourMode;
 	WrapMode wrapState;
-	PrintParameters();
+	PrintParameters() noexcept;
 };
 
 /**
@@ -97,11 +97,11 @@ public:
 	void operator=(EditView &&) = delete;
 	virtual ~EditView();
 
-	bool SetTwoPhaseDraw(bool twoPhaseDraw);
-	bool SetPhasesDraw(int phases);
-	bool LinesOverlap() const;
+	bool SetTwoPhaseDraw(bool twoPhaseDraw) noexcept;
+	bool SetPhasesDraw(int phases) noexcept;
+	bool LinesOverlap() const noexcept;
 
-	void ClearAllTabstops();
+	void ClearAllTabstops() noexcept;
 	XYPOSITION NextTabstopPos(Sci::Line line, XYPOSITION x, XYPOSITION tabWidth) const;
 	bool ClearTabstops(Sci::Line line);
 	bool AddTabstop(Sci::Line line, int x);
@@ -167,7 +167,7 @@ public:
 	AutoLineLayout(AutoLineLayout &&) = delete;
 	AutoLineLayout &operator=(const AutoLineLayout &) = delete;
 	AutoLineLayout &operator=(AutoLineLayout &&) = delete;
-	~AutoLineLayout() {
+	~AutoLineLayout() noexcept {
 		llc.Dispose(ll);
 		ll = nullptr;
 	}
@@ -177,7 +177,7 @@ public:
 	operator LineLayout *() const noexcept {
 		return ll;
 	}
-	void Set(LineLayout *ll_) {
+	void Set(LineLayout *ll_) noexcept {
 		llc.Dispose(ll);
 		ll = ll_;
 	}
diff --git a/src/Editor.cxx b/src/Editor.cxx
index 025931153..364b31fda 100644
--- a/src/Editor.cxx
+++ b/src/Editor.cxx
@@ -62,7 +62,7 @@ using namespace Scintilla;
 	return whether this modification represents an operation that
 	may reasonably be deferred (not done now OR [possibly] at all)
 */
-static bool CanDeferToLastStep(const DocModification &mh) {
+static bool CanDeferToLastStep(const DocModification &mh) noexcept {
 	if (mh.modificationType & (SC_MOD_BEFOREINSERT | SC_MOD_BEFOREDELETE))
 		return true;	// CAN skip
 	if (!(mh.modificationType & (SC_PERFORMED_UNDO | SC_PERFORMED_REDO)))
@@ -72,7 +72,7 @@ static bool CanDeferToLastStep(const DocModification &mh) {
 	return false;		// PRESUMABLY must do
 }
 
-static bool CanEliminate(const DocModification &mh) {
+static bool CanEliminate(const DocModification &mh) noexcept {
 	return
 	    (mh.modificationType & (SC_MOD_BEFOREINSERT | SC_MOD_BEFOREDELETE)) != 0;
 }
@@ -81,7 +81,7 @@ static bool CanEliminate(const DocModification &mh) {
 	return whether this modification represents the FINAL step
 	in a [possibly lengthy] multi-step Undo/Redo sequence
 */
-static bool IsLastStep(const DocModification &mh) {
+static bool IsLastStep(const DocModification &mh) noexcept {
 	return
 	    (mh.modificationType & (SC_PERFORMED_UNDO | SC_PERFORMED_REDO)) != 0
 	    && (mh.modificationType & SC_MULTISTEPUNDOREDO) != 0
@@ -89,13 +89,13 @@ static bool IsLastStep(const DocModification &mh) {
 	    && (mh.modificationType & SC_MULTILINEUNDOREDO) != 0;
 }
 
-Timer::Timer() :
+Timer::Timer() noexcept :
 		ticking(false), ticksToWait(0), tickerID{} {}
 
-Idler::Idler() :
+Idler::Idler() noexcept :
 		state(false), idlerID(0) {}
 
-static inline bool IsAllSpacesOrTabs(const char *s, unsigned int len) {
+static inline bool IsAllSpacesOrTabs(const char *s, unsigned int len) noexcept {
 	for (unsigned int i = 0; i < len; i++) {
 		// This is safe because IsSpaceOrTab() will return false for null terminators
 		if (!IsSpaceOrTab(s[i]))
@@ -1467,7 +1467,7 @@ void Editor::NotifyCaretMove() {
 void Editor::UpdateSystemCaret() {
 }
 
-bool Editor::Wrapping() const {
+bool Editor::Wrapping() const noexcept {
 	return vs.wrapState != eWrapNone;
 }
 
@@ -1616,7 +1616,7 @@ void Editor::LinesJoin() {
 	}
 }
 
-const char *Editor::StringFromEOLMode(int eolMode) {
+const char *Editor::StringFromEOLMode(int eolMode) noexcept {
 	if (eolMode == SC_EOL_CRLF) {
 		return "\r\n";
 	} else if (eolMode == SC_EOL_CR) {
@@ -2524,7 +2524,7 @@ void Editor::CheckModificationForWrap(DocModification mh) {
 }
 
 // Move a position so it is still after the same character as before the insertion.
-static inline Sci::Position MovePositionForInsertion(Sci::Position position, Sci::Position startInsertion, Sci::Position length) {
+static inline Sci::Position MovePositionForInsertion(Sci::Position position, Sci::Position startInsertion, Sci::Position length) noexcept {
 	if (position > startInsertion) {
 		return position + length;
 	}
@@ -2533,7 +2533,7 @@ static inline Sci::Position MovePositionForInsertion(Sci::Position position, Sci
 
 // Move a position so it is still after the same character as before the deletion if that
 // character is still present else after the previous surviving character.
-static inline Sci::Position MovePositionForDeletion(Sci::Position position, Sci::Position startDeletion, Sci::Position length) {
+static inline Sci::Position MovePositionForDeletion(Sci::Position position, Sci::Position startDeletion, Sci::Position length) noexcept {
 	if (position > startDeletion) {
 		const Sci::Position endDeletion = startDeletion + length;
 		if (position > endDeletion) {
@@ -2714,7 +2714,7 @@ void Editor::NotifyModified(Document *, DocModification mh, void *) {
 	}
 }
 
-void Editor::NotifyDeleted(Document *, void *) {
+void Editor::NotifyDeleted(Document *, void *) noexcept {
 	/* Do nothing */
 }
 
@@ -2850,7 +2850,7 @@ void Editor::NotifyMacroRecord(unsigned int iMessage, uptr_t wParam, sptr_t lPar
 }
 
 // Something has changed that the container should know about
-void Editor::ContainerNeedsUpdate(int flags) {
+void Editor::ContainerNeedsUpdate(int flags) noexcept {
 	needUpdateUI |= flags;
 }
 
@@ -3234,7 +3234,7 @@ constexpr short LowShortFromWParam(uptr_t x) {
 	return static_cast<short>(x & 0xffff);
 }
 
-unsigned int WithExtends(unsigned int iMessage) {
+unsigned int WithExtends(unsigned int iMessage) noexcept {
 	switch (iMessage) {
 	case SCI_CHARLEFT: return SCI_CHARLEFTEXTEND;
 	case SCI_CHARRIGHT: return SCI_CHARRIGHTEXTEND;
@@ -3261,7 +3261,7 @@ unsigned int WithExtends(unsigned int iMessage) {
 	}
 }
 
-int NaturalDirection(unsigned int iMessage) {
+int NaturalDirection(unsigned int iMessage) noexcept {
 	switch (iMessage) {
 	case SCI_CHARLEFT:
 	case SCI_CHARLEFTEXTEND:
@@ -3292,7 +3292,7 @@ int NaturalDirection(unsigned int iMessage) {
 	}
 }
 
-bool IsRectExtend(unsigned int iMessage, bool isRectMoveExtends) {
+bool IsRectExtend(unsigned int iMessage, bool isRectMoveExtends) noexcept {
 	switch (iMessage) {
 	case SCI_CHARLEFTRECTEXTEND:
 	case SCI_CHARRIGHTRECTEXTEND:
@@ -4018,7 +4018,7 @@ void Editor::Indent(bool forwards) {
 
 class CaseFolderASCII : public CaseFolderTable {
 public:
-	CaseFolderASCII() {
+	CaseFolderASCII() noexcept {
 		StandardASCII();
 	}
 	~CaseFolderASCII() override {
@@ -4163,7 +4163,7 @@ void Editor::GoToLine(Sci::Line lineNo) {
 	EnsureCaretVisible();
 }
 
-static bool Close(Point pt1, Point pt2, Point threshold) {
+static bool Close(Point pt1, Point pt2, Point threshold) noexcept {
 	if (std::abs(pt1.x - pt2.x) > threshold.x)
 		return false;
 	if (std::abs(pt1.y - pt2.y) > threshold.y)
@@ -4386,7 +4386,7 @@ bool Editor::PointInSelMargin(Point pt) const {
 	}
 }
 
-Window::Cursor Editor::GetMarginCursor(Point pt) const {
+Window::Cursor Editor::GetMarginCursor(Point pt) const noexcept {
 	int x = 0;
 	for (const MarginStyle &m : vs.ms) {
 		if ((pt.x >= x) && (pt.x < x + m.width))
@@ -4733,7 +4733,7 @@ void Editor::SetHotSpotRange(const Point *pt) {
 	}
 }
 
-Range Editor::GetHotSpotRange() const {
+Range Editor::GetHotSpotRange() const noexcept {
 	return hotspot;
 }
 
@@ -5576,11 +5576,11 @@ Sci::Position Editor::ReplaceTarget(bool replacePatterns, const char *text, Sci:
 	return length;
 }
 
-bool Editor::IsUnicodeMode() const {
+bool Editor::IsUnicodeMode() const noexcept {
 	return pdoc && (SC_CP_UTF8 == pdoc->dbcsCodePage);
 }
 
-int Editor::CodePage() const {
+int Editor::CodePage() const noexcept {
 	if (pdoc)
 		return pdoc->dbcsCodePage;
 	else
@@ -5616,7 +5616,7 @@ void Editor::AddStyledText(const char *buffer, Sci::Position appendLength) {
 	SetEmptySelection(sel.MainCaret() + lengthInserted);
 }
 
-bool Editor::ValidMargin(uptr_t wParam) const {
+bool Editor::ValidMargin(uptr_t wParam) const noexcept {
 	return wParam < vs.ms.size();
 }
 
@@ -5745,7 +5745,7 @@ void Editor::SetSelectionNMessage(unsigned int iMessage, uptr_t wParam, sptr_t l
 	ContainerNeedsUpdate(SC_UPDATE_SELECTION);
 }
 
-sptr_t Editor::StringResult(sptr_t lParam, const char *val) {
+sptr_t Editor::StringResult(sptr_t lParam, const char *val) noexcept {
 	const size_t len = val ? strlen(val) : 0;
 	if (lParam) {
 		char *ptr = CharPtrFromSPtr(lParam);
@@ -5757,7 +5757,7 @@ sptr_t Editor::StringResult(sptr_t lParam, const char *val) {
 	return len;	// Not including NUL
 }
 
-sptr_t Editor::BytesResult(sptr_t lParam, const unsigned char *val, size_t len) {
+sptr_t Editor::BytesResult(sptr_t lParam, const unsigned char *val, size_t len) noexcept {
 	// No NUL termination: len is number of valid/displayed bytes
 	if ((lParam) && (len > 0)) {
 		char *ptr = CharPtrFromSPtr(lParam);
diff --git a/src/Editor.h b/src/Editor.h
index a6e059714..9d0783f09 100644
--- a/src/Editor.h
+++ b/src/Editor.h
@@ -19,7 +19,7 @@ public:
 	enum {tickSize = 100};
 	TickerID tickerID;
 
-	Timer();
+	Timer() noexcept;
 };
 
 /**
@@ -29,7 +29,7 @@ public:
 	bool state;
 	IdlerID idlerID;
 
-	Idler();
+	Idler() noexcept;
 };
 
 /**
@@ -47,12 +47,12 @@ public:
 	enum workItems items;
 	Sci::Position upTo;
 
-	WorkNeeded() : items(workNone), upTo(0) {}
-	void Reset() {
+	WorkNeeded() noexcept : items(workNone), upTo(0) {}
+	void Reset() noexcept {
 		items = workNone;
 		upTo = 0;
 	}
-	void Need(workItems items_, Sci::Position pos) {
+	void Need(workItems items_, Sci::Position pos) noexcept {
 		if ((items_ & workStyle) && (upTo < pos))
 			upTo = pos;
 		items = static_cast<workItems>(items | items_);
@@ -69,8 +69,8 @@ public:
 	bool lineCopy;
 	int codePage;
 	int characterSet;
-	SelectionText() : rectangular(false), lineCopy(false), codePage(0), characterSet(0) {}
-	void Clear() {
+	SelectionText() noexcept : rectangular(false), lineCopy(false), codePage(0), characterSet(0) {}
+	void Clear() noexcept {
 		s.clear();
 		rectangular = false;
 		lineCopy = false;
@@ -88,16 +88,16 @@ public:
 	void Copy(const SelectionText &other) {
 		Copy(other.s, other.codePage, other.characterSet, other.rectangular, other.lineCopy);
 	}
-	const char *Data() const {
+	const char *Data() const noexcept {
 		return s.c_str();
 	}
-	size_t Length() const {
+	size_t Length() const noexcept {
 		return s.length();
 	}
-	size_t LengthWithTerminator() const {
+	size_t LengthWithTerminator() const noexcept {
 		return s.length() + 1;
 	}
-	bool Empty() const {
+	bool Empty() const noexcept {
 		return s.empty();
 	}
 private:
@@ -113,22 +113,22 @@ struct WrapPending {
 	enum { lineLarge = 0x7ffffff };
 	Sci::Line start;	// When there are wraps pending, will be in document range
 	Sci::Line end;	// May be lineLarge to indicate all of document after start
-	WrapPending() {
+	WrapPending() noexcept {
 		start = lineLarge;
 		end = lineLarge;
 	}
-	void Reset() {
+	void Reset() noexcept {
 		start = lineLarge;
 		end = lineLarge;
 	}
-	void Wrapped(Sci::Line line) {
+	void Wrapped(Sci::Line line) noexcept {
 		if (start == line)
 			start++;
 	}
-	bool NeedsWrap() const {
+	bool NeedsWrap() const noexcept {
 		return start < end;
 	}
-	bool AddRange(Sci::Line lineStart, Sci::Line lineEnd) {
+	bool AddRange(Sci::Line lineStart, Sci::Line lineEnd) noexcept {
 		const bool neededWrap = NeedsWrap();
 		bool changed = false;
 		if (start > lineStart) {
@@ -302,7 +302,7 @@ protected:	// ScintillaBase subclass needs access to much of Editor
 	PRectangle RectangleFromRange(Range r, int overlap);
 	void InvalidateRange(Sci::Position start, Sci::Position end);
 
-	bool UserVirtualSpace() const {
+	bool UserVirtualSpace() const noexcept {
 		return ((virtualSpaceOptions & SCVS_USERACCESSIBLE) != 0);
 	}
 	Sci::Position CurrentPosition() const;
@@ -347,8 +347,8 @@ protected:	// ScintillaBase subclass needs access to much of Editor
 	struct XYScrollPosition {
 		int xOffset;
 		Sci::Line topLine;
-		XYScrollPosition(int xOffset_, Sci::Line topLine_) : xOffset(xOffset_), topLine(topLine_) {}
-		bool operator==(const XYScrollPosition &other) const {
+		XYScrollPosition(int xOffset_, Sci::Line topLine_) noexcept : xOffset(xOffset_), topLine(topLine_) {}
+		bool operator==(const XYScrollPosition &other) const noexcept {
 			return (xOffset == other.xOffset) && (topLine == other.topLine);
 		}
 	};
@@ -368,7 +368,7 @@ protected:	// ScintillaBase subclass needs access to much of Editor
 	virtual void NotifyCaretMove();
 	virtual void UpdateSystemCaret();
 
-	bool Wrapping() const;
+	bool Wrapping() const noexcept;
 	void NeedWrapping(Sci::Line docLineStart=0, Sci::Line docLineEnd=WrapPending::lineLarge);
 	bool WrapOneLine(Surface *surface, Sci::Line lineToWrap);
 	enum class WrapScope {wsAll, wsVisible, wsIdle};
@@ -441,13 +441,13 @@ protected:	// ScintillaBase subclass needs access to much of Editor
 	void NotifySavePoint(Document *document, void *userData, bool atSavePoint) override;
 	void CheckModificationForWrap(DocModification mh);
 	void NotifyModified(Document *document, DocModification mh, void *userData) override;
-	void NotifyDeleted(Document *document, void *userData) override;
+	void NotifyDeleted(Document *document, void *userData) noexcept override;
 	void NotifyStyleNeeded(Document *doc, void *userData, Sci::Position endStyleNeeded) override;
 	void NotifyLexerChanged(Document *doc, void *userData) override;
 	void NotifyErrorOccurred(Document *doc, void *userData, int status) override;
 	void NotifyMacroRecord(unsigned int iMessage, uptr_t wParam, sptr_t lParam);
 
-	void ContainerNeedsUpdate(int flags);
+	void ContainerNeedsUpdate(int flags) noexcept;
 	void PageMove(int direction, Selection::selTypes selt=Selection::noSel, bool stuttered = false);
 	enum { cmSame, cmUpper, cmLower };
 	virtual std::string CaseMapString(const std::string &s, int caseMapping);
@@ -495,7 +495,7 @@ protected:	// ScintillaBase subclass needs access to much of Editor
 	bool PositionInSelection(Sci::Position pos);
 	bool PointInSelection(Point pt);
 	bool PointInSelMargin(Point pt) const;
-	Window::Cursor GetMarginCursor(Point pt) const;
+	Window::Cursor GetMarginCursor(Point pt) const noexcept;
 	void TrimAndSetSelection(Sci::Position currentPos_, Sci::Position anchor_);
 	void LineSelection(Sci::Position lineCurrentPos_, Sci::Position lineAnchorPos_, bool wholeLine);
 	void WordSelection(Sci::Position pos);
@@ -552,52 +552,52 @@ protected:	// ScintillaBase subclass needs access to much of Editor
 	bool PositionIsHotspot(Sci::Position position) const;
 	bool PointIsHotspot(Point pt);
 	void SetHotSpotRange(const Point *pt);
-	Range GetHotSpotRange() const override;
+	Range GetHotSpotRange() const noexcept override;
 	void SetHoverIndicatorPosition(Sci::Position position);
 	void SetHoverIndicatorPoint(Point pt);
 
-	int CodePage() const;
+	int CodePage() const noexcept;
 	virtual bool ValidCodePage(int /* codePage */) const { return true; }
 	Sci::Line WrapCount(Sci::Line line);
 	void AddStyledText(const char *buffer, Sci::Position appendLength);
 
 	virtual sptr_t DefWndProc(unsigned int iMessage, uptr_t wParam, sptr_t lParam) = 0;
-	bool ValidMargin(uptr_t wParam) const;
+	bool ValidMargin(uptr_t wParam) const noexcept;
 	void StyleSetMessage(unsigned int iMessage, uptr_t wParam, sptr_t lParam);
 	sptr_t StyleGetMessage(unsigned int iMessage, uptr_t wParam, sptr_t lParam);
 	void SetSelectionNMessage(unsigned int iMessage, uptr_t wParam, sptr_t lParam);
 
-	static const char *StringFromEOLMode(int eolMode);
+	static const char *StringFromEOLMode(int eolMode) noexcept;
 
 	// Coercion functions for transforming WndProc parameters into pointers
-	static void *PtrFromSPtr(sptr_t lParam) {
+	static void *PtrFromSPtr(sptr_t lParam) noexcept {
 		return reinterpret_cast<void *>(lParam);
 	}
-	static const char *ConstCharPtrFromSPtr(sptr_t lParam) {
+	static const char *ConstCharPtrFromSPtr(sptr_t lParam) noexcept {
 		return static_cast<const char *>(PtrFromSPtr(lParam));
 	}
-	static const unsigned char *ConstUCharPtrFromSPtr(sptr_t lParam) {
+	static const unsigned char *ConstUCharPtrFromSPtr(sptr_t lParam) noexcept {
 		return static_cast<const unsigned char *>(PtrFromSPtr(lParam));
 	}
-	static char *CharPtrFromSPtr(sptr_t lParam) {
+	static char *CharPtrFromSPtr(sptr_t lParam) noexcept {
 		return static_cast<char *>(PtrFromSPtr(lParam));
 	}
-	static unsigned char *UCharPtrFromSPtr(sptr_t lParam) {
+	static unsigned char *UCharPtrFromSPtr(sptr_t lParam) noexcept {
 		return static_cast<unsigned char *>(PtrFromSPtr(lParam));
 	}
-	static void *PtrFromUPtr(uptr_t wParam) {
+	static void *PtrFromUPtr(uptr_t wParam) noexcept {
 		return reinterpret_cast<void *>(wParam);
 	}
-	static const char *ConstCharPtrFromUPtr(uptr_t wParam) {
+	static const char *ConstCharPtrFromUPtr(uptr_t wParam) noexcept {
 		return static_cast<const char *>(PtrFromUPtr(wParam));
 	}
 
-	static sptr_t StringResult(sptr_t lParam, const char *val);
-	static sptr_t BytesResult(sptr_t lParam, const unsigned char *val, size_t len);
+	static sptr_t StringResult(sptr_t lParam, const char *val) noexcept;
+	static sptr_t BytesResult(sptr_t lParam, const unsigned char *val, size_t len) noexcept;
 
 public:
 	// Public so the COM thunks can access it.
-	bool IsUnicodeMode() const;
+	bool IsUnicodeMode() const noexcept;
 	// Public so scintilla_send_message can use it.
 	virtual sptr_t WndProc(unsigned int iMessage, uptr_t wParam, sptr_t lParam);
 	// Public so scintilla_set_id can use it.
diff --git a/src/MarginView.cxx b/src/MarginView.cxx
index 9dcd81f3a..3f386455a 100644
--- a/src/MarginView.cxx
+++ b/src/MarginView.cxx
@@ -100,7 +100,7 @@ void DrawWrapMarker(Surface *surface, PRectangle rcPlace,
 		y - 2 * dy);
 }
 
-MarginView::MarginView() {
+MarginView::MarginView() noexcept {
 	wrapMarkerPaddingRight = 3;
 	customDrawWrapMarker = nullptr;
 }
diff --git a/src/MarginView.h b/src/MarginView.h
index 1d5d46cac..4468afa1b 100644
--- a/src/MarginView.h
+++ b/src/MarginView.h
@@ -32,7 +32,7 @@ public:
 	 * existing platforms must implement as empty. */
 	DrawWrapMarkerFn customDrawWrapMarker;
 
-	MarginView();
+	MarginView() noexcept;
 
 	void DropGraphics(bool freeObjects);
 	void AllocateGraphics(const ViewStyle &vsDraw);
diff --git a/src/PositionCache.cxx b/src/PositionCache.cxx
index b8829a571..aeb8d8bcf 100644
--- a/src/PositionCache.cxx
+++ b/src/PositionCache.cxx
@@ -99,7 +99,7 @@ void LineLayout::EnsureBidiData() {
 	}
 }
 
-void LineLayout::Free() {
+void LineLayout::Free() noexcept {
 	chars.reset();
 	styles.reset();
 	positions.reset();
@@ -391,7 +391,7 @@ void LineLayoutCache::AllocateForLevel(Sci::Line linesOnScreen, Sci::Line linesI
 	PLATFORM_ASSERT(cache.size() == lengthForLevel);
 }
 
-void LineLayoutCache::Deallocate() {
+void LineLayoutCache::Deallocate() noexcept {
 	PLATFORM_ASSERT(useCount == 0);
 	cache.clear();
 }
@@ -409,7 +409,7 @@ void LineLayoutCache::Invalidate(LineLayout::validLevel validity_) {
 	}
 }
 
-void LineLayoutCache::SetLevel(int level_) {
+void LineLayoutCache::SetLevel(int level_) noexcept {
 	allInvalidated = false;
 	if ((level_ != -1) && (level != level_)) {
 		level = level_;
@@ -465,7 +465,7 @@ LineLayout *LineLayoutCache::Retrieve(Sci::Line lineNumber, Sci::Line lineCaret,
 	return ret;
 }
 
-void LineLayoutCache::Dispose(LineLayout *ll) {
+void LineLayoutCache::Dispose(LineLayout *ll) noexcept {
 	allInvalidated = false;
 	if (ll) {
 		if (!ll->inCache) {
@@ -488,7 +488,7 @@ static unsigned int KeyFromString(const char *charBytes, size_t len) {
 	return k;
 }
 
-SpecialRepresentations::SpecialRepresentations() {
+SpecialRepresentations::SpecialRepresentations() noexcept {
 	const short none = 0;
 	std::fill(startByteHasReprs, std::end(startByteHasReprs), none);
 }
@@ -664,11 +664,11 @@ TextSegment BreakFinder::Next() {
 	}
 }
 
-bool BreakFinder::More() const {
+bool BreakFinder::More() const noexcept {
 	return (subBreak >= 0) || (nextBreak < lineRange.end);
 }
 
-PositionCacheEntry::PositionCacheEntry() :
+PositionCacheEntry::PositionCacheEntry() noexcept :
 	styleNumber(0), len(0), clock(0), positions(nullptr) {
 }
 
@@ -701,7 +701,7 @@ PositionCacheEntry::~PositionCacheEntry() {
 	Clear();
 }
 
-void PositionCacheEntry::Clear() {
+void PositionCacheEntry::Clear() noexcept {
 	positions.reset();
 	styleNumber = 0;
 	len = 0;
@@ -721,7 +721,7 @@ bool PositionCacheEntry::Retrieve(unsigned int styleNumber_, const char *s_,
 	}
 }
 
-unsigned int PositionCacheEntry::Hash(unsigned int styleNumber_, const char *s, unsigned int len_) {
+unsigned int PositionCacheEntry::Hash(unsigned int styleNumber_, const char *s, unsigned int len_) noexcept {
 	unsigned int ret = s[0] << 7;
 	for (unsigned int i=0; i<len_; i++) {
 		ret *= 1000003;
@@ -734,11 +734,11 @@ unsigned int PositionCacheEntry::Hash(unsigned int styleNumber_, const char *s,
 	return ret;
 }
 
-bool PositionCacheEntry::NewerThan(const PositionCacheEntry &other) const {
+bool PositionCacheEntry::NewerThan(const PositionCacheEntry &other) const noexcept {
 	return clock > other.clock;
 }
 
-void PositionCacheEntry::ResetClock() {
+void PositionCacheEntry::ResetClock() noexcept {
 	if (clock > 0) {
 		clock = 1;
 	}
@@ -754,7 +754,7 @@ PositionCache::~PositionCache() {
 	Clear();
 }
 
-void PositionCache::Clear() {
+void PositionCache::Clear() noexcept {
 	if (!allClear) {
 		for (PositionCacheEntry &pce : pces) {
 			pce.Clear();
diff --git a/src/PositionCache.h b/src/PositionCache.h
index 1f0486415..d004dbcd2 100644
--- a/src/PositionCache.h
+++ b/src/PositionCache.h
@@ -96,7 +96,7 @@ public:
 	virtual ~LineLayout();
 	void Resize(int maxLineLength_);
 	void EnsureBidiData();
-	void Free();
+	void Free() noexcept;
 	void Invalidate(validLevel validity_);
 	int LineStart(int line) const;
 	int LineLength(int line) const;
@@ -163,7 +163,7 @@ public:
 	void operator=(const LineLayoutCache &) = delete;
 	void operator=(LineLayoutCache &&) = delete;
 	virtual ~LineLayoutCache();
-	void Deallocate();
+	void Deallocate() noexcept;
 	enum {
 		llcNone=SC_CACHE_NONE,
 		llcCaret=SC_CACHE_CARET,
@@ -171,11 +171,11 @@ public:
 		llcDocument=SC_CACHE_DOCUMENT
 	};
 	void Invalidate(LineLayout::validLevel validity_);
-	void SetLevel(int level_);
-	int GetLevel() const { return level; }
+	void SetLevel(int level_) noexcept;
+	int GetLevel() const noexcept { return level; }
 	LineLayout *Retrieve(Sci::Line lineNumber, Sci::Line lineCaret, int maxChars, int styleClock_,
 		Sci::Line linesOnScreen, Sci::Line linesInDoc);
-	void Dispose(LineLayout *ll);
+	void Dispose(LineLayout *ll) noexcept;
 };
 
 class PositionCacheEntry {
@@ -184,7 +184,7 @@ class PositionCacheEntry {
 	unsigned int clock:16;
 	std::unique_ptr<XYPOSITION []> positions;
 public:
-	PositionCacheEntry();
+	PositionCacheEntry() noexcept;
 	// Copy constructor not currently used, but needed for being element in std::vector.
 	PositionCacheEntry(const PositionCacheEntry &);
 	// Deleted so PositionCacheEntry objects can not be assigned.
@@ -193,11 +193,11 @@ public:
 	void operator=(PositionCacheEntry &&) = delete;
 	~PositionCacheEntry();
 	void Set(unsigned int styleNumber_, const char *s_, unsigned int len_, const XYPOSITION *positions_, unsigned int clock_);
-	void Clear();
+	void Clear() noexcept;
 	bool Retrieve(unsigned int styleNumber_, const char *s_, unsigned int len_, XYPOSITION *positions_) const;
-	static unsigned int Hash(unsigned int styleNumber_, const char *s, unsigned int len_);
-	bool NewerThan(const PositionCacheEntry &other) const;
-	void ResetClock();
+	static unsigned int Hash(unsigned int styleNumber_, const char *s, unsigned int len_) noexcept;
+	bool NewerThan(const PositionCacheEntry &other) const noexcept;
+	void ResetClock() noexcept;
 };
 
 class Representation {
@@ -213,7 +213,7 @@ class SpecialRepresentations {
 	MapRepresentation mapReprs;
 	short startByteHasReprs[0x100];
 public:
-	SpecialRepresentations();
+	SpecialRepresentations() noexcept;
 	void SetRepresentation(const char *charBytes, const char *value);
 	void ClearRepresentation(const char *charBytes);
 	const Representation *RepresentationFromCharacter(const char *charBytes, size_t len) const;
@@ -262,7 +262,7 @@ public:
 	void operator=(BreakFinder &&) = delete;
 	~BreakFinder();
 	TextSegment Next();
-	bool More() const;
+	bool More() const noexcept;
 };
 
 class PositionCache {
@@ -277,9 +277,9 @@ public:
 	void operator=(const PositionCache &) = delete;
 	void operator=(PositionCache &&) = delete;
 	~PositionCache();
-	void Clear();
+	void Clear() noexcept;
 	void SetSize(size_t size_);
-	size_t GetSize() const { return pces.size(); }
+	size_t GetSize() const noexcept { return pces.size(); }
 	void MeasureWidths(Surface *surface, const ViewStyle &vstyle, unsigned int styleNumber,
 		const char *s, unsigned int len, XYPOSITION *positions, const Document *pdoc);
 };